योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-81, verse-47

निमेषांशावबोधो हि चिदणोः प्रतिभासते ।
यतः कल्पसहस्रौघः स्वप्ने वार्धकबाल्यवत् ॥ ४७ ॥

nimeṣāṃśāvabodho hi cidaṇoḥ pratibhāsate ,
yataḥ kalpasahasraughaḥ svapne vārdhakabālyavat 47

47. nimeṣāṃśāvabodhaḥ hi cidaṇoḥ pratibhāsate
yataḥ kalpasahasraughaḥ svapne vārdhakabālyavat

47. cidaṇoḥ nimeṣāṃśāvabodhaḥ hi pratibhāsate
yataḥ svapne vārdhakabālyavat kalpasahasraughaḥ

47. The awareness of even a tiny fraction of a moment manifests within the infinitesimal consciousness (cid-aṇu). Because of this, a vast expanse of thousands of cosmic eons (kalpa) can appear, much like old age and childhood are experienced within a dream.

Words meanings summery:

• निमेषांशावबोधः (nimeṣāṁśāvabodhaḥ) - awareness of a part of a moment, cognition of a fraction of an instant

• हि (hi) - indeed, surely, for, because

• चिदणोः (cidaṇoḥ) - of the infinitesimal consciousness, of the conscious atom

• प्रतिभासते (pratibhāsate) - manifests, appears, shines forth, is perceived

• यतः (yataḥ) - whence, wherefrom, because, from which

• कल्पसहस्रौघः (kalpasahasraughaḥ) - a flood of thousands of kalpas, a multitude of thousands of cosmic eons

• स्वप्ने (svapne) - in a dream, in sleep

• वार्धकबाल्यवत् (vārdhakabālyavat) - like old age and childhood, similar to old age and youth

Words meanings and morphology

निमेषांशावबोधः (nimeṣāṁśāvabodhaḥ) - awareness of a part of a moment, cognition of a fraction of an instant

(noun)

Nominative, masculine, singular of nimeṣāṃśāvabodha

nimeṣāṁśāvabodha - awareness of a part of a moment, cognition of a fraction of an instant

Compound noun formed from nimeṣa (moment), aṃśa (part), and avabodha (awareness)

Compound type : tatpurusha (nimeṣa+aṃśa+avabodha)

• nimeṣa – a wink, a blink, an instant, a moment
  noun (masculine)
  Prefix: ni
  Root: miṣ (class 1)
• aṃśa – part, portion, share, fraction
  noun (masculine)
  Root: aṃś (class 1)
• avabodha – awareness, cognition, perception, understanding
  noun (masculine)
  Derived from root budh (to know) with upasarga ava
  Prefix: ava
  Root: budh (class 1)

हि (hi) - indeed, surely, for, because

(indeclinable)

चिदणोः (cidaṇoḥ) - of the infinitesimal consciousness, of the conscious atom

(noun)

Genitive, masculine, singular of cidaṇu

cidaṇu - infinitesimal consciousness, conscious atom

Compound of cit (consciousness) and aṇu (atom/infinitesimal)

Compound type : tatpurusha (cit+aṇu)

• cit – consciousness, intelligence, understanding, perceiving
  noun (feminine)
  Root: cit (class 1)
• aṇu – atom, molecule, minute particle, infinitesimal
  noun (masculine)

प्रतिभासते (pratibhāsate) - manifests, appears, shines forth, is perceived

(verb)

3rd person , singular, ātmanepada, present (laṭ) of pratibhāsate

Prefix: prati

Root: bhās (class 1)

यतः (yataḥ) - whence, wherefrom, because, from which

(indeclinable)

Ablative adverb derived from yad (which)

कल्पसहस्रौघः (kalpasahasraughaḥ) - a flood of thousands of kalpas, a multitude of thousands of cosmic eons

(noun)

Nominative, masculine, singular of kalpasahasraugha

kalpasahasraugha - a flood of thousands of kalpas, a multitude of thousands of cosmic eons

Compound of kalpa (cosmic eon), sahasra (thousand), and ogha (flood/multitude)

Compound type : tatpurusha (kalpa+sahasra+ogha)

• kalpa – cosmic eon, a day of Brahma, a long period of time
  noun (masculine)
  Root: kḷp (class 1)
• sahasra – a thousand
  noun (neuter)
• ogha – flood, stream, multitude, mass
  noun (masculine)
  Root: uh (class 1)

स्वप्ने (svapne) - in a dream, in sleep

(noun)

Locative, masculine, singular of svapna

svapna - dream, sleep

Root: svap (class 2)

वार्धकबाल्यवत् (vārdhakabālyavat) - like old age and childhood, similar to old age and youth

(adjective)

singular of vārdhakabālyavat

vārdhakabālyavat - like old age and childhood, similar to old age and youth

Adjective (suffix -vat) derived from the dvandva compound vārdhakabālya (old age and childhood)

Compound type : dvandva (vārdhaka+bālya)

• vārdhaka – old age, senility
  noun (neuter)
  Derived from vṛddha (old)
• bālya – childhood, infancy, youth
  noun (neuter)
  Derived from bāla (child)

Note: Used here as an adverbial adjective 'like old age and childhood'.